Chopper assembly for a harvesting implement

ABSTRACT

A chopping assembly for a harvesting implement having a blade assembly, a housing, and a guide. The blade assembly is disposed within the housing and the guide directs cornstalks toward an input port on the housing. The blade assembly not only cuts the cornstalk from its root but also chops the stalk into stover. A fluid dynamic force is created by the blade assembly to direct the stover with the aid of the housing to an output port.

CROSS REFERENCE TO A RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No. 12/868,985 filed Aug. 26, 2010 which is a continuation-in-part of Ser. No. 12/420,494 filed Apr. 8, 2009.

FIELD OF THE INVENTION

This invention relates to a chopper assembly. More particularly, this invention relates to a chopper assembly for a harvesting implement.

BACKGROUND OF THE INVENTION

Harvesting corn is well known in the art. Conventionally, corn pickers remove the ears from the stalks and process those ears on through the machine, while leaving the stalks flattened against the ground and secured to their root structure. The stalks left in this condition are difficult to pick up and utilize for corn fodder, silage or biomass. To improve upon this, devices have been developed that not only remove the ears of corn from the stalks, but also cut the stalks and put them into a windrow whereupon they can be easily picked up and utilized as desired, such as by being processed through a chopping machine.

While these devices have provided some improvement in the art, there are still deficiencies preventing commercial adoption. To begin, these devices require many moving parts, are complex to manufacture, and are susceptible to wear. In addition, the devices are built into the machine and therefore are difficult to remove and repair. Finally, because these devices are built into the machines they are not adaptable for use on different corn heads for desired applications. Accordingly, there exists a need in the art for a device that addresses these deficiencies.

Therefore, an object of the present invention is to provide a chopping assembly for a harvesting implement that has fewer moving parts.

Another objective is to provide a dedicated chopper/transport assembly for each individual row without impacting adjacent rows.

Yet another object of the present invention is to provide a chopping device for a harvesting implement that is removable.

A still further object of the present invention is to provide a chopping assembly for a harvesting implement that is adaptable to different sized corn headers.

These and other objects, features, or advantages of the present invention will become apparent from the specification and claims.

SUMMARY OF THE INVENTION

A chopping assembly for a harvesting implement having a blade assembly, a housing, and a guide. The blade assembly is disposed within the housing and the guide directs cornstalks toward an input port on the housing. The blade assembly not only cuts the cornstalk from its root but also chops the stalk into stover. A fluid dynamic force is created by the blade assembly to direct the stover with the aid of the housing to an output port.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side elevational view of a combine having a corn head with an attached chopper assembly;

FIG. 2 is a bottom perspective view of a chopper assembly;

FIG. 3 is a bottom elevational view of a chopper assembly;

FIG. 4 is a bottom sectional view of a chopper assembly; and

FIG. 5 is a side view in partial cross section of a chopper assembly.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to the figures, a harvesting implement 10, such as a combine, has a corn head 12 carried by the combine. The corn head 12 has a plurality of gathering shoes 14 and a frame 16. Positioned between each pair of adjacent gathering shoes 14 is a picking assembly 18 which has stalk rolls 20 that interact with the cornstalks and ears of corn, and an auger 22 positioned behind the picking assembly 18 to direct the picked corn to a desired location.

The chopping assembly 24 is positioned below and mounted to the corn head 12. The chopping assembly 24 includes a blade assembly 26, a housing 28, and a chopper guide 30. The blade assembly 26 includes a plurality of blades 32 that are attached to and extended outwardly from a drive shaft 34. In one embodiment, the blades 32 lie in more than one generally horizontal plane in relation to the drive shaft 34. Preferably, each blade 32 has a wing 33 and a sharp cutting edge on both sides making the blades reversible. The drive shaft 34 is connected to a source of power (not shown).

Surrounding the blade assembly 26 is a housing 28. The housing 28 has a top wall 36 connected to the corn head frame 16 with an opening 38 through which the drive shaft 34 extends, an arcuate side wall 40 and a bottom wall 42 having an opening 41 and a slot 43. The side wall 40 has an input port 44 and an output port 46.

The chopper guide 30 includes two elongated members 48, 50. The elongated members 48, 50 are mounted in spaced angled relation to the bottom of the corn head 12 at one end and the bottom of the housing 28 at the opposite end. The angle of the elongated members 48, 50 tapers downwardly and inwardly from the corn head 12 to the housing 28.

Mounted to and in communication with the output port 46 is an outwardly extending exhaust channel or conduit 52. The exhaust channel 52 is adjacent to a conveyor 54 at the end remote from the exhaust port 46.

The conveyor 54 has a removable cover 56 that allows for easy access to the conveyor 54 to unplug or service the conveyor 54. Within the conveyor 54, on the side walls of the cover 56 are guides 58 that direct material on the conveyor 54.

Located at the entrance of the exhaust channel 52 is an adjustable shear plate 60 that is connected to the exhaust channel 52. The adjustable shear plate 60 allows one to adjust the clearance between housing 28 and the exhaust channel 52 to protect and prevent wear of the channel 52. At the opposite end of the channel 52 is a deflector 62 that guides the material toward the center of the combine as material leaves the channel 52. In one embodiment, the walls of the channel 52 are tapered such that the cross section is increasing as material moves toward the discharge end.

In an additional embodiment the channel 52 has a door 64 that is part of the bottom wall of the channel 52. In a normal position, the door 64 lies parallel to the bottom wall. The door is opened by a handle 66 which permits material to fall to the ground when desired.

In operation, as the harvesting implement moves forward cornstalks are directed toward the picking assembly 18 by the gathering shoes 14. The picking assembly 18 engages the cornstalk with the stalk rolls 20 to separate the ear of corn from the stalk. The ear of corn is then transported by the auger 22 to its desired location.

As the picking assembly 18 is engaging the stalk to separate the ear of corn from the stalk, the stalk is captured by the elongated guide members 48 and 50 and directed toward the input port 44 of housing 28. As the stalk enters the input port 44 and is captured in the slot 43, the blades 32, which are rotated by drive shaft 34, cut the stalk from its roots and further cuts the stalk into stover. Also, debris from the picking assembly 18 falls through the opening 38 in the top wall 36 and is added to the stover. The rotation of the blades 32 creates a fluid dynamic force that blows the stover, with assistance of the housing 28, out of the output port 46, through the exhaust channel 52 to the conveyor 54. The conveyor 54 transports the stover to a windrow position. 

1. A chopping assembly for a farm implement, comprising: a corn head mounted to a frame; a housing positioned below the corn head and having a top wall with an opening, a bottom wall, and an arcuate side wall having an input port disposed within a front surface of the housing an output port disposed within a rear surface of the housing; wherein the top wall of the housing is mounted flush to the corn head's bottom surface; a blade assembly having a plurality of blades wherein the plurality of blades are disposed within the housing between the top wall and bottom wall of the housing and are surrounded by the arcuate side wall such that the housing is arcuate with respect to the circumferential path of the blades; wherein the plurality of blades lie in more than one parallel plane within the housing and are horizontal with respect to the top wall of the housing, the bottom surface of the corn header, and the bottom wall of the housing; and wherein each of the plurality of blades has a wing which extends linearly along an interior facing surface of the blade.
 2. The assembly of claim 1 wherein each of the plurality of blades has side edges.
 3. The assembly of claim 2 wherein the wing is between the side edges on each of the plurality of blades.
 4. The assembly of claim 1 wherein the plurality of blades extend outwardly from a drive shaft in more than one horizontal plane.
 5. A chopping assembly for a farm implement, comprising: a corn head mounted to a frame; a housing having a top wall with an opening, a bottom wall, and an arcuate side wall including an input port within a front surface of the housing and an output port within a rear surface of the housing; wherein the top wall of the housing is mounted flush to the corn head's bottom surface; a blade assembly disposed within the housing having a plurality of blades surrounded by the arcuate side wall of the housing, wherein each of the plurality of blades has a wing; and a chopper guide including elongated guide members wherein the elongated guide members are spaced apart from one another and are mounted to and extend outward from the front surface of the housing on either side of the input port at a first end to the bottom surface of the corn head at a second end.
 6. The assembly of claim 5 wherein the elongated guide members extend outward from the front surface of the housing at a downward angle from the bottom wall of the housing at the first end to the bottom surface of the corn head at the second end.
 7. The assembly of claim 5 wherein inner edges of the elongated guide members taper inwardly at an angle from the second end of the elongated guide members to the input port such that the elongated guide members capture and direct corn stalks toward the input port of the housing.
 8. The assembly of claim 5 wherein the bottom wall of the housing has a slot which captures the cornstalk as the cornstalk enters the input port.
 9. The assembly of claim 2 wherein the side edges on each of the plurality of blades include a sharp cutting surface.
 10. The assembly of claim 1 wherein the plurality of blades are positioned within the housing to cut a cornstalk entering the housing through the input port from its root and chop the cornstalk into stover and the housing is mounted flush to the corn head's bottom surface below a picking assembly such that debris from the picking assembly falls through the opening in the top wall and is added to the stover wherein the blades and wing creates a fluid dynamic force that blows the stover out of the output port. 